habitica-android/Habitica/res/drawable/indicator_diamond.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_selected="true">
        <layer-list>
            <item android:drawable="@drawable/indicator_diamond_selected" android:height="24dp" />
        </layer-list>
    </item>
    <item>
        <layer-list>
            <item android:drawable="@drawable/indicator_diamond_unselected" android:height="24dp" />
        </layer-list>
    </item>
</selector>